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Phill D
6th July 2018, 06:31 AM
I was asked recently by my Daughter if I could provide an image that could be printed up to over 3m x 2m to be put on a wall in their office. I've provided one and will be intrigued to see how it looks when it's done. I was wondering if anyone else has had a 4/3s image blown up large and what it looked like?

Phill D
6th July 2018, 06:52 AM
Here's the image she chose.

http://e-group.uk.net/gallery/data/500/20180704-P7040690-3.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/99535)

Petrochemist
6th July 2018, 08:59 AM
A lovely peaceful scene that should help keep the office calm :)
I've never printed anywhere near that big. Only twice to anything bigger than ~A4.
One of my large prints worked well the other was disappointing, probably because it was cropped more.


It might be worth producing a calculated crop to print to A4 that will reflect the final output. Big prints get expensive & the crop might give some idea of how it will work out. People will no doubt end up looking at it close up...

Ricoh
6th July 2018, 10:05 AM
WhiteWall are recommended by the people I know print large for exhibitions.
Here’s a link: https://r.search.yahoo.com/_ylt=AwrLIwUVPT9bjAMA.SNB4iA5;_ylu=X3oDMTByaW11dnN vBGNvbG8DaXIyBHBvcwMxBHZ0aWQDBHNlYwNzcg--/RV=2/RE=1530899862/RO=10/RU=https%3a%2f%2fuk.whitewall.com%2f/RK=2/RS=XjF3K20rpcC.cn6R9M_xhco5ck4-

Do the maths (math for our American cousins who have no idea what I’m talking about :) ) to see how close you get to 300dpi from such a massive enlargement. Another factor is the viewing distance, but you have little control over that unless you erect a barrier to prevent close inspection. At 3x2 m you probably want a viewing distance of 5m or so.
What’s your scaffolding skills like? :)

Phill D
6th July 2018, 11:08 AM
I think office calmness was the idea Mike so hopefully it will be suitable. Mind you even at full size resolution enlarging to that size won't give many pixels per inch (approx 50dpi i think) so yes it might look a bit iffy close up. There will be some equipment in front of it so I guess people won't generally be closer than 3m away. Hope that will be far enough Steve.

Crazy Dave
6th July 2018, 11:14 AM
Hi Phil

Two year ago, I was fortunate enough to have one of my images used for a poster campaign by the National Portrait Gallery. It appeared throughout the London Underground network and measured about 6’ x 4’. They had a Tiff file taken with my EM-5 Mk 1 so 16MP sensor. They also had a poster suspended in the gallery itself that was even larger.

Don’t know if that helps but hopefully you can push the limits without it costing you an arm and a leg.

Good Luck!

David

shenstone
6th July 2018, 11:21 AM
As said above it all depends on the quality you want in the end and how close

I printed this (bigger file size obviously)

http://www.e-group.uk.net/gallery/data/500/pen6.jpg

and a number of other pictures from that shoot off on an AO plotter 841 x 1189 mm and it looked fine for the purpose of a book launch. they looked fine on the wall from a couple of feet away - so much so that I was asked for copies properly printed by a few people there

for "wallpaper" it should be OK even at that size

If you are unsure how the printer will handle the upscaling then do that to the file before you send it so you can see what a 100% version looks like from a few feet away before you send it.

Regards
Andy

OM USer
6th July 2018, 12:16 PM
Here's the image she chose....

A nice calm serene picture. Great choice.

Phill D
6th July 2018, 02:47 PM
I'm not worried about the price as the company she works for is getting it printed and also put on the wall. I'll just be keen to see how it turns out.

Zuiko
6th July 2018, 05:07 PM
I went to an exhibition by David Noton several years ago and he had some fantastic large prints of this sort of size, taken with a 16mp full frame Cannon IIRC. Don't forget you can upsize the file to a certain extent and you won't need anything like 300ppi when printing this big. Nice picture!

Jim Ford
6th July 2018, 09:48 PM
http://www.e-group.uk.net/gallery/data/500/pen6.jpg
Andy

Is that Cribyn in the Brecon Beacons?

Jim

shenstone
7th July 2018, 06:52 AM
Close. It's Pen-y-fan from Corn Ddu. Cribyn is the next peak, hidden from view

Phill D
7th July 2018, 07:32 AM
Andy did you use the hires mode for that one?

shenstone
7th July 2018, 08:35 AM
No.

That was taken with the E620 with the kit lens. I was doing training for the 3 peaks and borrowed the Mrs camera as it was lighter than my E30 with the 14-54

I have not tried High res mode for anything since I got my EM1.2 - if I can go that big with a 12Mp sensor I have enough for anything I want to do with 20

As I said it was printed on a plotter so not pixel perfect up close, but definitely worked

Regards
Andy

pdk42
7th July 2018, 10:12 PM
When upsizing, the trick is to use interpolation to add pixels that wouldn't otherwise be there. Bi-cubic interpolation is the most common. This means that you'll be seeing apparently more DPI than a straight enlargement calculation might indicate. You obviously can't add detail that isn't there, but using interpolation will preserve apparent sharpness if you go looking closely.

Apps like Photoshop will do interpolative upsizing so you can do it before you send the image for printing. I'd hope that a decent print shop would do it for you though before they print if you hadn't done anything yourself.

Phill D
8th July 2018, 06:02 AM
Just looked interpolative upsizing up Paul. Hopefully they will know what they are doing and apply it as I didn't. The article I read was really informative I definitely learnt a lot thanks for the prompt. For anyone else interested this is what I read. https://www.cambridgeincolour.com/tutorials/image-interpolation.htm
It also explains image rotation degradation too which is something I hadn't realised happened before. Oddly enough although I rarely do it other than 90 degrees I did rotate the last butterfly I posted in Beagletorque's thread by about 45 degrees so may be it did lose a bit of sharpness doing that? Anyway just had a thought what about straightening horizons, that also presumably comes with a loss of resolution too?

blu-by-u
16th August 2018, 04:06 AM
I'm not worried about the price as the company she works for is getting it printed and also put on the wall. I'll just be keen to see how it turns out.

Well? How did it turn out? Any photo of you next to it?:confused:

Otto
16th August 2018, 08:10 AM
Must have missed this thread the first time round. Thanks for that Link Phill, very informative. I knew what interpolation is, but the explanation of the different types is very helpful.

Phill D
16th August 2018, 02:57 PM
No probs Richard you are welcome.
As for how it turned out Henry well it was very good actually although I've not been able to see it installed in person myself. Everyone who's seen it has been impressed so it looks like the printers did a good job even though they printed it too big! and had to crop it a bit. Charlotte did take a few shots of it on her phone so I'll see what they look like and maybe post one.

Phill D
16th August 2018, 03:41 PM
Hope these look ok as they are shrunk down phone pics but they should give an impression. The wall was 3m x 2m. The second is only 20cm from the surface, a lot closer than anyone would be in reality.

http://e-group.uk.net/gallery/data/500/IMG-20180710-WA0002_Big_picture-001.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/99972)

http://e-group.uk.net/gallery/data/500/IMG-20180710-WA0005_Big_picture_close_up_20cm-001.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/99973)

Otto
16th August 2018, 04:38 PM
Who needs full-frame? :)

Phill D
16th August 2018, 06:56 PM
Couldn't agree more Richard *chr.

blu-by-u
17th August 2018, 03:34 AM
Phill D, WOW :eek:*please

Phill D
17th August 2018, 09:31 AM
Henry you are really great for my confidence *chr *chr :)
All I can say is don't be afraid to print large ;)

blu-by-u
20th August 2018, 09:43 AM
Henry you are really great for my confidence *chr *chr :)
All I can say is don't be afraid to print large ;)

If wifey permits. as of now, nothing bigger than A4 :( and it stays inside my pocket folder file.

Phill D
22nd August 2018, 08:29 AM
You've got to get some of those recent landscapes on the wall Henry. They are far too good to just sit in a folder. Sounds like you need to invest in a few bunches of flowers :)

blu-by-u
23rd August 2018, 03:42 AM
.... need to invest in a few bunches of flowers :)

*eyebrows Sounds like a good idea. Should I print them first then follow by the flowers? Present at the same time. :D

Phill D
23rd August 2018, 11:33 AM
Up to you Henry. Wouldn't want it to be my fault if it goes wrong :D

blu-by-u
28th August 2018, 02:40 PM
Up to you Henry. Wouldn't want it to be my fault if it goes wrong :D

Just saw her holiday travels itinerary..mdm is not going to be around October for 12 days. *devil

Now, is which should I print then hang it up when mdm is away *devil

Gwyver
28th August 2018, 04:23 PM
Just saw her holiday travels itinerary..mdm is not going to be around October for 12 days. *devil

Now, is which should I print then hang it up when mdm is away *devil

Make sure the flowers are fresh on the day she returns :)

blu-by-u
29th August 2018, 02:27 AM
Make sure the flowers are fresh on the day she returns :)

:D yes yes ;):D

Dave in Wales
22nd March 2019, 11:17 AM
Micro 4/3 is good enough for big prints - YouTube

Phill D
22nd March 2019, 11:43 AM
Good video Dave, nice spot.

Crazy Dave
22nd March 2019, 01:17 PM
This video reinforces my decision to never part with my OM-D EM-5 Mk 1 regardless of what I may buy in the future. I have had a few of my photos from this camera enlarged to 4' x 3' for posters and once to more than twice that size.

David